Key Laboratory of Radiological Protection and Nuclear Emergency Chinese Center for Disease Control and Prevention, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China.
Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.
Eur Radiol. 2024 Mar;34(3):1659-1666. doi: 10.1007/s00330-023-10005-7. Epub 2023 Sep 6.
To report the results of a dose survey conducted across 31 provinces in mainland China from 2017 to 2018 and to analyse the dose level to determine the national diagnostic reference levels (DRLs) for paediatric CT procedures.
At least ten patients for each age group (0- < 1, 1- < 5, 5- < 10, 10- < 15 years) and each procedure (head, chest and abdomen) for each CT scanner were selected from four to eight hospitals in each province. The dose information (CTDI and DLP) was collected from the HIS or RIS-PACS systems. The median values in each CT scanner were considered the representative dose values for the paediatric patients in CT scanning. The national DRLs were estimated based on the 75th percentile distribution of the median values.
A total of 24,395 patients and 319 CT scanners were investigated across 262 hospitals. For paediatric CT scanning in 4 different age groups, the median (P) and the 75th percentile (P) of CTDI and DLP for each scanning procedure were calculated and reported. National DRLs were then proposed for each procedure and age group.
The dose level of CT scanning for children in mainland China was reported for the first time. The DRLs for paediatric CT in the present study are similar to those in some Asian countries but higher than those in European countries.
The paediatric CT is an extensively used tool in diagnosing paediatric disease; however, children are more sensitive to radiation. Establishing the diagnostic reference level of paediatric CT examination is necessary to reduce the dose of CT in children and promote the optimisation of medical exposure.
• The DRLs for 3 paediatric CT procedures (head, chest and abdomen) and 4 age groups (0- < 1, 1- < 5, 5- < 10, 10- < 15 years) were proposed in mainland China first time. • The examination parameter and dose for children need to be further optimised in China, especially to lower the tube voltage in paediatric CT.
报告 2017 年至 2018 年期间在中国内地 31 个省进行的剂量调查结果，并分析剂量水平，以确定儿科 CT 检查的国家诊断参考水平（DRL）。
从每个省的四到八家医院中选择每个年龄组（0-<1 岁、1-<5 岁、5-<10 岁、10-<15 岁）和每个 CT 扫描仪的每个程序（头部、胸部和腹部）至少 10 名患者。剂量信息（CTDI 和 DLP）从 HIS 或 RIS-PACS 系统中收集。每个 CT 扫描仪的中位数被认为是 CT 扫描中儿科患者的代表性剂量值。基于中位数分布的第 75 百分位数来估计国家 DRL。
共调查了 262 家医院的 24395 名患者和 319 台 CT 扫描仪。对于 4 个不同年龄组的儿科 CT 扫描，计算并报告了每个扫描程序的 CTDI 和 DLP 的中位数（P）和第 75 百分位数（P）。然后为每个程序和年龄组提出了国家 DRL。
首次报告了中国内地儿童 CT 扫描的剂量水平。本研究中儿科 CT 的 DRL 与一些亚洲国家相似，但高于欧洲国家。
儿科 CT 是诊断儿科疾病的广泛使用工具；然而，儿童对辐射更敏感。建立儿科 CT 检查的诊断参考水平对于降低儿童 CT 剂量和促进医疗照射的优化是必要的。
• 首次在中国提出了 3 种儿科 CT 程序（头部、胸部和腹部）和 4 个年龄组（0-<1、1-<5、5-<10、10-<15 岁）的 DRL。• 在中国，需要进一步优化儿童的检查参数和剂量，特别是降低儿科 CT 的管电压。
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